Get ready for a new and exciting challenge! The UGears Butterfly comes as 168 pre-cut pieces that are ready to be assembled into a natural beauty. The butterfly not only looks elegant on its own but can also be wound with a simple rubber band motor to bring it to life with gentle wing beats that beautifully imitate the flutters of its living counterparts. No glue, tools or external power sources are required; the kit comes with everything needed. Since the pieces fully interlock, the model can be built right away. The final result of construction is an elegant mechanical model with a tempting flower. Since the kit is made of real wood, it has a natural woodsy scent, which only heightens the delicate patterns of the leaves and other natural wonders.