Place a small mirror in a clear glass of water. Put the glass on a sunny windowsill. Position the mirror in the glass so the sun will hit it and cause a rainbow to shine on the wall. Point out the rainbow to your child, then move the glass to make a rainbow somewhere else.
To encourage working together try "Puzzle Sharing".
Separate the pieces of a puzzle into two piles. Give one pile to each child. To assemble the puzzle, have the children take turns selecting pieces from their piles.
Using a large piece of corrugated cardboard tie a rope or heavy string to one end. Have the kids take turns pulling each other around the room on this "Indoor Sled". It works well on carpeting.
How can I make an easy costume?