We also use another table for larger display at Yule, but I got an Ikea Molger mirror on purpose for use as a wall altar kind of space as well as a mirror for the foyer area.
http://www.ikea.com/us/en/catalog/products/40149160
The mirror is inset, so we can rest things on top and along the bottom because the frame can work like shelves where we can place items. For Imbolc -- Child made a pipe cleaner Brigid cross and I put a lot of taper candles. She and I keep adding to it until it's time to change it around for Ostara. But because it is high up, then she can't be messing with it and has to ask me to put stuff in or take it out so this helps a lot with a small child.
Under it there is an Ikea Expedit shelf on wheels with cubbies. This keeps our shoes, backpacks and all that organized in the foyer. But the top is sometimes used for "touchable" altar bits that the child can freely play with.
Given the age of child, our stuff is very kiddie craft. I avoid breakables where possible and when not, I put them up on the mirror. She enjoys bringing nature in. We also have been enjoying the tutorials at
http://weefolkart.com/content/free-patterns-gallery
HTH!
A.