Distant friends of ours had baby #4 mid December. We didn't do anything at the time, but I would like to send them something. Baby is almost 3 months old. What should I get?

All 4 of their kids are same gender, so I assume they are set with clothes. Are there any items in particular it would be nice to have new of? I feel like the ship has sailed on swaddles and burp rags, given my tardiness!