P4-P7 have made land yachts. The cars can ride very fast down the ramp even on the flat floor. Our land yacht is made out of something called corraflute and the axles are made out of something called doweling and the axles have straws on them so they can move with the wheels on them. The sail on our land yachts is made out of corraflute to but it is stuck on to the bottom with masking tape.
