Materials Needed: - A firm block of foam (we used a 6″ x 3″ x 2″ piece from Walmart for $1. This piece would provide enough for a dozen cars.) -4 bottle lids for wheels - 2 straws -2 skewers - a rubberband (it needs to be longer than the smallest dimension of your foam when pinched flat — 2″ in my case — so that when you stick it through the foam, it will protrude on both ends). -2 googly eyes (optional) -a pipe cleaner for a mouth (optional) - 2 AAA battery holder - 2 AAA batteries -1.5-3 V DC Motor -switch - Insulated wire (I used 22 gauge, but it’s not really important. Only a short (about 4″) piece is needed.)
Supplies + Tools: - Scissors - Wire strippers - Needle nose pliers - Hot glue gun - Ruler - Pencil -X-acto knife (for cutting eraser) - Butter knife for cutting foam (could also use X-acto or other knife)