You aren't really going to find "Peleontology Tools" as a category in a store - online or otherwise. Just perhaps one of those little dino-dig kits with the plastic model in plaster. Just things like picks, brushes, shovels ... that's all you really need. If you are lucky to have an American Science and Surplus store near you - I'd recommend making a visit - you'll likely find everything you could ever want ... and more.
Picks - just like the kind the dental hygienist pokes your teeth with - also used for sculpting clay. We use them to carefully pick dirt and debris from the cracks and crevices of our fossils. You can also get pics with wooden handles but the steel sets have more weight to them and are a bit sturdier. Oh...and they're sharp ... make sure your kids can handle them. 
Carving set intended for sculpting is particularly useful when you are going for a more authentic dig where fossils are embedded in a matrix - these are great for chipping away the "rock". Again - I like the steel tools because there is more weight to them.
​A nice set of small wire brushes. Sized well for small hands and good for brushing away rock and dirt in a way that a toothbrush just can't. The wire bristles are pokey and don't feel good against your skin - just a heads up ... from experience. 
This is a great little field microscope. I picked ours up at American Science and Surplus, bit this is the same one. The magnification isn't so high that it gets hard to use, but high enough to see a world of details that you couldn't see otherwise ... and the price is right. No need to deal with slides, field microscopes can be pressed against whatever you're examining. Kids can see all the little details of the rocks, fossils, minerals and amber. (Looking at a bug in amber through this is really cool).  
A handy sifting pan for finding fossils in the dirt. Used for the basic dinosaur dig for little ones. You can get various sizes of mesh - this is the 1/4" - good for letting dirt, clay, and small rocks through but catching the fossils. Fits onto a 5 gallon bucket if you want to keep the dirt under control. (btw - also have found this handy for the garden on non-dino days.)