The tile floor can be really cold to little feet in winter! My boy used to wear socks at home when he was small, then I started making indoor slipper for him when he was 2.
The first one I made for him is a pair of poodle and strawberry print, with olive green checks binding. It’s all fabric. I quilted several layers (6-7 layers) of fabric for the bottom, so it’s thick enough but not too stiff. The top is sewn with a batting for maintaining the arch shape. He really loves it.
This bicycle print is his second and current pair of slipper, in size 3-4T. I especially love this one, yellow with grey is my thing. ^^