Rabbot

Print and cut out the template

Cut two small pieces of Maker Tape, about 1" long each

Without removing the backing, slide a piece of the Maker Tape through the slit in the body, so just a short bit is poking out the side without the template

I'll refer to the side of the body with the template as the "inside" (since it'll be inside the Rabbot when it's folded up)

Peel off the backing, but only for the piece of Maker Tape sticking out on the inside

Trim off that piece of backing

Stick down the piece of tape

Remove the rest of the backing on the Maker Tape

Stick down the tape on the side of the body without the template (the outside)

This is the side that will be visible when everything is folded up

Tip: You can trim the Maker Tape before removing the backing if you don't want very much showing on the outside

Repeat with the other slit so there are two pieces of Maker Tape

Add more Maker Tape following the paths on the template

Leave some extra hanging off the side of the body

Fold the extra on itself to create two small tabs

Give your rabbot a face!

Make sure you're drawing on the outside of the body, and on the half where the slits with the Maker Tape are

Draw paws around the Maker Tape

You can also decorate at the end, but I found it was easier to draw while everything was still flat

On the inside, add a piece of regular tape over the slits, making sure it covers the Maker Tape

Make sure the tape is bigger than the magnet! The tape is there to insulate the magnet from the Maker Tape — otherwise the magnet itself closes the electrical circuit!

Tape the magnet on, right in between the slits

Use a needle to poke holes in the ears where indicated on the template

If you want to add any decoration to the ears, it's easiest to do now rather than at the end

Glue the ears to the body

Make sure that you're attaching them to the inside, and on the half of the body where the rectangular cutout is (there should be an arrow on the template that will get partially covered)

Crease along the dashed lines in the template — this will make it easier to fold the Rabbot up later

Use the sewing needle to poke holes in the paper where indicated on the template

Fold all the tabs up where indicated on the template

Glue the side so the tabs are on the inside of the body; they'll overlap on top of the ears

Make sure you're gluing it with the arrows on the side and body pointing towards each other (not shown in photo because I made the mistake of gluing this wrong! I had to poke new holes for the thread)

Thread the servo wire through the rectangular cutout in the body

Move the servo so the back is flush with the side of the body

Fold the servo holder

Glue the servo holder around the servo

The part with the diagonal cut out should face the curved part of the body

You don't need to put any glue on the servo itself; the tabs on the servo holder should glue directly to the body

Cut two pieces of thread about 12" each

Knot one end of the thread (like you're sewing)

Using the sewing needle, sew a piece of thread through the hole in the ear and then the hole in the body

Add a drop of glue on the back of the ear so the knot doesn't pull through the paper

Do the same thing with the other ear

Tie the two strings together just above the servo

Tie the two pieces of thread to the LEGO axle mount

You want to tie it so that when the LEGO axle mount points up, the thread is loose enough for the ears to be fully extended, but when it points down, the thread is tight enough to pull the ears down

Attach the LEGO axle mount to the servo

Connect your servo and battery holder to the Bit Board on Pin 1

Upload the code from here: Rabbot Code

Test that the mechanism works as expected

When the Bit Board turns on, the servo should pull the ears down; pressing and holding the A button should raise them up again

Fold the rabbot up and glue the body closed

Glue the two halves of the carrot together, leaving a pocket open at the top for the magnet

When the glue is dry, slide the magnet into the pocket

Attach the carrot stem then glue the pocket shut

Add a strip of Maker Tape to one side of the carrot, making sure that it's on top of the magnet (since that's where it'll stick best to the Rabbot)

I used a piece of 1/4" tape to give the carrot more conductive area, but you can also just put two pieces of 1/8" tape side by side

Connect the Maker Tape tabs to the Bit Board at pins GND and 0

I looped the Maker Tape around the holes in the Bit Board, like in Step 4 of this project

You can use a LEGO baseplate instead of looping the Maker Tape

Note that the order of which tabs connect to GND and 0 doesn't matter; the micro:bit is only sensing when they're completing a circuit

Give your Rabbot a carrot!

Its ears should bounce up and down, then stay upright in joy...

...but if you take the carrot away, the ears will droop again

If it's not working, make sure that the Maker Tape on the back of the carrot is contacting both pieces of tape on the body

It's best to store the Rabbot with its ears fully extended so the paper doesn't stay permanently drooped. One thing you can try to make the ears more springy is to attach a thin strip of plastic to the back of ears