Hi everybody I need a little help

I am gong to make a 3d enviroment with linkeble img. I don´t know how Im going to do to get the img linkeble. The scene is a room with a table, on the table theres a hammer which if you move the cursor on it you can click so you can use it.

Im very greatfull if someone will help me with that.

Regards

Lasse/Sweden