DP's family do a weird one handed clap thing at my baby and my nephew (SILs baby)
We never had any babies in our family except me and my bro, and Ive never seen anyone else do this. MIL is a nursery nurse though. Is this some kind of developmental play thing like peek-a-boo that I dont know because Ive never really come into contact with babies? Should I be doing it?