In the video, a young child is sitting on the floor and playing with a set of colorful building blocks. The child is wearing a blue shirt and has blonde hair. The building blocks are of various colors, including red, blue, green, and yellow. The child picks up a red block and places it on top of a blue one, then picks up a green block and places it on top of the red one. The child continues to stack the blocks on top of each other, carefully selecting each block to ensure that they are balanced. The child seems to be enjoying the activity, and the blocks are scattered around them on the floor.