This indoor croquet will be perfect for your kids. They will play it all day long! For making the tunnels cut strips of paper. For example, you can use 8 1/2 x 11 pieces and cut them in half. Fold the shorter ends in about a half an inch to an inch. Then use washi tape or regular tape to secure it on the floor. If you need an appropriate indoor croquet mallet, you will need cardboard tube, washi tape or other tape, cutting blade, small plastic bat, yard stick, broom handle and ball (optional). Cut the cardboard tube down and use the bat to mark a circle for the bat to sit in. Use the cutting blade to cut out the circle. Continue reading the tutorial here.