Sew Fantastic: Lots of ideas here that can be used for fine motor
Toddler threading activity with giant cardboard beads. Could be a little project to have them paint the tubes, let them dry, and cut the tubes into smaller lengths (with some help). Add stickers for decoration and even more fine motor practice!
Fine Motor Activities for Kids
Cardboard tube and hair elastics
TDAH: Actividad para trabajar las emociones básicas y la empatía