Little tykes can come indoors.
Pile up some pillows on the floor and let the kids run and jump on them. Take 2 old blankets and stitch 3 edges together. Kids can flop down on it and use it for all sorts of play activities. Fill old Wet Wipe containers with pop corn kernals. A large house plants scooter on rollers covered it with carpet using a staple gun makes a great basement scooter.