Great idea but not durable

We purchased two transporters for our boys.The Ben 10 Alien Creation Chamber allows kids to create different aliens with a slide of the shell.The set includes two figures with interchangeable alien parts creating many unique aliens.We thought this was a great idea!However, we were sorry we bought this toy within hours of receiving it (we even ordered it online paying extra for shipping).The transporter has many pieces in order to transform the aliens into other aliens.The pieces are small and not very durable.Within the first day one arm broke and another transporter did not work at all.It was difficult to transform the aliens into other aliens.My boys lost interest quickly for the one transporter that mildly worked.Within several days most of the parts were lost or broken.My boys take great care of thier toys.However, this Ben 10 Alien Creation Chamber will only last if placed in a glass box.