I forget. What's the appropriate age to give someone their first Led Zep album? I'm picturing a 4 month old belting out Black Dog.
Anyway, I'm guessing that you would like to be invited back again someday, right? In that case, I'll leave the crib-mounted camel spider mobile off to the side for the moment. Infants like musical objects, but a singing Billy Bass can creep them out. I'm just sayin'...
Bright primary colors, funny sounds, and rounded contours are generally well received. This is why babies love Bapu. Just ask him the next time he's around.