This Oball is beautifully soft and flexible and offers by the major and minor holes plenty of opportunities in the ball hineinzugriefen or even small things (eg mini stuffed animals, naturally dyed silk handkerchief) hineinzustecken. I'll fix probably still one or two bells in it, then he makes a little noise. Very nice colors and just the right size. The 10cm-Oball I would find already too small for our almost 6 month old son.