Ay, normal lang yan! At 3 months, ang babies ay usually hindi pa fully capable ng tummy time strength, some babies start to show signs of pushups lang like your little one, pero marami pang hindi gaano kalakas. Ang tightening ng tummy ay actually good sign na gumagana ang core muscles niya na, kaya don't worry! But if you're concerned about development or gusto mo ng peace of mind, best to check with your pediatrician sa next visit para ma-guide ka on what milestones to watch for, lagi kaming nagtanong ito sa doctor, especially first time moms dito sa amin. Every baby develops at their own pace, so hindi mo dapat i-stress ang sarili mo.