Are very easy to insert and remove at least as accruing. The large Vertiefunen to the tapered one the things can easily be removed with a plug. That works, but also with skillful fingers. It will probably only keep small children from removing the parts, as long as the Koordiantionsfähigkeit the fingers is not as pronounced. But until then, we hope the child with NO !!! aufeklärt ;-)
At least the parts are solid and make a better impression than all the rest ...
my daughter is now 1.5 years old and the things you still hold far ... increasing to 5 stars