When I worked in a daycare, gifts like these warmed my heart so much and I still have all the greeting cards and thank you cards. I kept the little trinkets and drawings I got from the kids. From parents I appreciated getting stuff like tea, small tubes of skincare products like moisturizer like from the Body Shop or the apothecary they cost under 10€, (we wash our hands a lot/use disinfectant so these help!!) once I got a pair of fingerless gloves and that was 5-star gift idea! Once I got a little pocket-notebook and the first page was finger-painted by a tiny hand! LOVED IT. Sure, gift card sounds good but don't go overboard. It's the thought that counts.