Curious sa feet or toes

My baby who is 7 months has been playing sa feet nya lately. Napapabangon minsan to look at them (di naman matagal) or to hold/reach them. Sometimes pinapalo-palo pa nya. Tas minsan sinusubo pa nya yung toes nya. Parang it started when he learned to sit kasi mas kita na nya sila. Sabi ni pedia nag-e-explore daw. But just want to know how common this is like yung discovering hands/ fingers. And medyo may pagkapraning mom po kasi ako. 🤦‍♀️😅 #firsttimemom #ftm