We have been working on color recognition with our toddler recently. Earlier this week, I did a Color Sorting Activity with magazine clippings and the activity we did today also requires very few materials. All you need for this one is construction paper and toys!
After picking three colors of construction paper, we gathered toys of those colors. I took an extra step and laminated the construction paper, but that is completely optional. Mr. Not so Crafty and I went over each color with our daughter again and encouraged her to match the toys with the same color construction paper.
Toddlers learn through play, so quick activities like this might not look overly educational to adults, but they are very helpful when teaching early skills.