Not only would buying them a gift be nice but its almost a must. FIrstly, you’d be showing nice manners towards neighborly peace and good relations. Its always important to show others honor and do whatever you can to win them over so you maintain peaceful living quarters.
Next, you must realize that Yaakov avinu’s gifts presented themselves BEFORE HIM on his way to Esav his evil brother. Gifts have a way of winning people’s hearts. It says in Orchot Tzaddikim that the magnanimus person is loved by everyone.
Giving is a very great attribute.
But by that baby outfit on sale. Never spend too much. Especially for a bnei Yishmael! lol