While purchasing an automatic baby cradle is a very exciting and joyous moment. However setting up of it might risk of hurting the finger nails. Especially beautiful young mother finger nail has been well kept for many years. Most of the automatic rocking cradle on the market required the connecting of springs to the metal plate. While opening the spring with finger nail, it is very easy to damage the finger nails.

The Roo Cuddle design team has invested some time to resolve this troubling issue with a special hooking method of spring which does not require the user to use finger nails to setup the spring connection.

The solution is just using one hand, the user can change the springs by snap-on method. The design also considers the safety factor that a small closed gap where the spring cannot jump out from the hook by itself.