Everything your infant ever dreamed of!!
Color Shades Busy Bag (Day 18) 31 Days of Busy Bags & Quiet Time Activities @ AllOurDays.com
Velcro Shapes (all one color, idea is to match shapes, not match colors...)
Sensory play for babies
Learn with Play at Home: Toddler gross motor colour learning game.
10+ Super Easy Sensory Plays | FUN AT HOME WITH KIDS
Great fine motor activity and it's next to no cost too