needle & thread
hot glue gun
sharp kitchen knife
70 cm yellow fleece (140 cm wide), cut into 6 squares (32x32 cm)
question mark template
white and black fleece or felt
yellow and white thread
yellow zipper (Optilong, 60 cm)
custom sound module (order at Simbits)
2 AA batteries
adhesive backed velcro
2 firm plastic sheets (30.5x30.5 cm)
4 light rubber bars (30x5x5 cm)
1 sheet of soft foam rubber (0.5 cm thick)
1 flexible plastic sheet
Step 1: The Cover
1. Iron the fusible interfacing to the backside of the white fleece. Make sure you leave the protection in place on the other side of the interfacing.
2. Use the question mark template to transfer the drawing onto the white fleece. Cut the shape out of the fabric. Repeat for the second mark.
3. Cut strips of black fleece to create the drop-shadows on the side of the question marks.
4. Position the question marks and black strips on a yellow square and iron them on. Put a piece of cotton or baking paper between the iron and the fleece so the interfacing will not stick to your iron.
5. For added durability, sew around the question mark (optional).
6. Pin four yellow squares together (right sides facing each other) to create the walls of the block. Make sure you alternate between a plain square and a square with a question mark. Stitch them together on the sides. You have approximately 1 cm margin for the seams.
7. Take another square and pin it to the top. All right sides facing inwards. Stitch completely around all edges.
8. Take the last square and pin it to the bottom. Leave two sides open! Stitch two sides.
9. Align one side of the zipper along the bottom of the cube. Check that you do not position it inside-out! (You can fasten it with one pin, turn outside-in and see how the zipper will end up.) If all is correct, pin it and sew loosely by hand. Remove the pins.
10. Open the zipper and align the other side to the walls of the cube. Pin and sew by hand.
11. Sew the zipper with the sewing machine. Tip: start sewing with the zipper half-opened. When you reach the pulling tag of the zipper, you cannot pass it with the machine because the tag is too wide. Release the presser foot of the machine. Gently pull the cover towards you so you can reach the zipper tag. Close the zipper, re-position the presser foot and continue sewing.
12. Remove the hand-sewn thread, open the zipper and turn the cover outside-in.
Your cover is now finished.