If your baby is overdue, his/her skin may well be dry and cracked. 't be tempted to use any creams or lotions as this may do more harm than good. The top layer of the baby's skin will peel off over the next few days, leaving perfect skin underneath. Continue with plain water for the first month.
Most children's bath products also come in special formulations for sensitive skins, and it's best to stick to these, especially for babies, who are prone to skin rashes and dry patches.
Bubble baths tend to contain perfumes and colorants, so if you want to use these, watch out for any skin reaction.
If you suspect your baby or child has eczema or any other allergic skin condition, seek your doctor's advice on bath products, as there are special emollient bath additives which may be free on prescription.