It appears indeed one should keep his promises in the context of a small gift. The Rambam writes (MT Mechira 7:9) (based on the gemara in Baba Metzia 49a)
Similarly, if a person promised to give a colleague a gift and failed to do so, he is considered to be faithless. When does the above
apply? With regard to a small gift, because the recipient will ...
In the circles in which I travel (American, generally modern/centrist Orthodox), there aren't any particular restrictions on acceptable gifts for a Bat/Bar Mitzva. The types of gifts I've seen most frequently are money, gift cards, Jewish books, and Judaica objects, but I've also seen other kinds of gifts that one might give a young adult of that age on a ...
I read a responsum years ago that said that if the gift giver feels he would not consume the item due to a personal chumra and the recipient would (e.g. I keep pat yisrael and you don't, here's a nice kosher pat palter loaf of bread) it was fine, but if there was doubt as to whether the item was actually kosher (e.g. I don't trust Octagon-K and think their ...
אִ֖ישׁ כְּמַתְּנַ֣ת יָד֑וֹ כְּבִרְכַּ֛ת יְהוָ֥ה אֱלֹהֶ֖יךָ אֲשֶׁ֥ר
But each with his own gift, according to the blessing that the LORD your God has bestowed upon you.
Each person shall bring his hand-deliverd gift, depending on the
blessing that God your Lord grants you.
This seems to ...