When I was pregnant and I have seen in baby catalogs this manual and Fußrasseln, I thought it was time for another one arrant nonsense of the gaming industry. No sooner had our little one to the world, I found these things but then very cute and he kicks so much with the arms and legs, I thought, to make it with these rattles a pleasure. Every child is different, so I can at this point only report what we experienced. Namely: nothing. That's right, nothing. Our Sohnemann has repeatedly get tied the rattles and has not interested in them. Times looked short, sometimes just touched and simply "normal" back into play. In addition, the rattle 1 are extremely quiet and only 2 rattles when you shake really Doll. When our son (now 13 weeks) came before it but rarely.
In addition, the parts are now too small, so just for babies up to 8-10 weeks.
Plus point: the workmanship is good, can be so strongly drawn to it and shaken without something happening.