The pull-back action works perfectly – they zoom across the floor with surprising speed, which always gets a giggle. They've already survived some impressive 'crashes' and still look brand new, which speaks volumes about their durability. Perfect size for little hands, and great for encouraging imaginative play. If you're looking for a fun, well-made toy that will keep kids entertained for hours, I highly recommend these monster trucks. Definitely a 5-star purchase!"