Toy Cubby Pull-Back Train Set - Mega Pack of 12 Parts - Amazing Party Favor Vehicles - A Must to Have! 12 pieces Kids Mini Pull Back Trains. Pullback trains is made of durable plastic and comes with assorted colors. Measures 4 inches each train. Provides for a long hour of entertainment for your kids. Safe and lightweight- easy to play just pull back the train then release. Perfect for childrens party, makes a great party favors or goody bags fillers, hand these out to kids and watch gets having fun with these toys.