Oo, normal yan sa age na yan, mama! Some kids are just quiet observers pa lang and they'll catch up, ang importante talaga ay nakaka-follow siya ng instructions at playful pa rin, so you're doing good. Pero if you're worried, walang malisya mag-consult with your pedia lang para ma-assess nang maayos, basta para sa peace of mind mo at maybe they can give tips kung kailangan pa ng activity suggestions.