What project can I make with Square Tiles?

Here are some ideas:

https://www.pinterest.com/pin/318559373621536243/?lp=true

http://hative.com/creative-ideas-for-reusing-leftover-ceramic-tiles/

I have also used mine to make personalized trivets for those hot pots or dishes

Depending on size.....coasters or outdoor walkway. Glue to outside of a planter to give a more refined look. Depending on color break some to make a mosaic in concrete for a stepping stone or table top. Glue a hanger on the back and paint or decoupage a picture on the front. Hot glue a ribbon around the whole tile edge and leave extra to hang it and paint a message like Welcome or Love on it or paint it with blackboard paint for messages to family.

You could break them into smaller pieces and then mosaic them onto a patio table, garden steps, flower pots, etc. Just grout in between the pieces after they have dried.

If they’re 8x8, Maybe decoupage some Christmas scenes and give them as gifts. If they’re 2x2 or a little larger, make coasters out of them.

These are great suggestions. I find pinterest full of ideas for things like this

Make an address hanger for your front door: http://www.toworkwithmyhands.com/2016/09/diy-tile-house-number-door-decor.html