My 4 year old decided that since his Bubby (my 8 yr old) gets a cool pinewood derby car again this year, so should he. Last year we did Thomas the train for him, this year, he wants Wow Wow Wubbzy, a character from a Nick Jr Cartoon. This is what I have done so far for cutting the car, and the axle holes are drilled. I think I'll order some yellow BSA wheels to go with it. Top pic is of a Wubbzy toy we took the design from. Thanks to my wife for drawing out the design, I have no skills in that dept