I would like to apply a natural finish to some blocks that i made for my 8 month old daughter. I have read that mineral spirits should not be used on toys for children younger than 3 years. I am considering just a plain beeswax finish. Has anyone done this before? I am not sure if i should melt the wax and then rub it on? I think the finish is necessary as the blocks are made out of maple and a few of them have some spalt. Thanks for your help!