Can I give just one child a Christmas gift?

My cousins have children. Cousin A has 1 child. Cousin B has 2 and cousin C has 1.

Cousin As daughter FaceTimes me basically every day and loves to see me. The other two cousins kids don’t really see me or FaceTime me.

We typically gift Christmas gifts but since cousin C just had a baby my mom declared we shouldn’t gift anything anymore because it’s too much. Last year we gifted them coloring books and crayons from the dollar store which they loved and used during our family Xmas party.

I had suggested we gift them all a kiwico crate because they’re $9 for BF before my mom announced no gifts.

I still want to gift cousin As child the crate because I know she’d love it so much and is very into educational things. I don’t totally want to gift all 4 of them crates because I’d be doing it on my own.

Would you gift cousin As child a crate?