We have both blocks and sticks in all 24 colors for our kids. I prefer the blocks but they prefer the sticks. I feel they are more creative with the blocks - it's like eating veggies for some kids, it's good for them but they don't enjoy it as much as other foods. They like the sticks because they are able to draw more detail, but much less detail than with regular crayola crayons. My daughter was a 'fist grip' kid until she was almost six and still reverts to it on occasion. We found using grips that only allow proper grip helped a lot. These are what we use:Â http://www.amazon.com/Pencil-Grip-Crossover-Ergonomic-Metallic/dp/B001SN8HPI/ref=sr_1_2?ie=UTF8&qid=1291921411&sr=8-2
 . I've noticed the block crayons encouraging the fist grip.Â
Â
The block crayons are great because they are super sturdy, I've even tried breaking one and it won't crack in half. They encourage crative drawing and different pictures than the norm as well as getting the kids to think outside the box on how to color with them (like sweeping strokes with the large side for sky). The sticks are great for regular coloring but, honestly, my kids choose crayolas over these because they can create more detail although they like the rich color and smooth coloring of the stockmars.Â
Â
We've never used the crayon rocks but I've seen them in the store. They are much smaller than I thought, maybe half the length of my index finger (and I have small hands). They looked like they would be very difficult to color with and would be unusable after a few pictures worth of wear. The stockmars last basically forever, even if the sticks break you can 'glue' them back together by slightly melting the broken part and holding it together until it hardens, just hold it over the stove burner for a moment.Â
Â
If you have regular crayons laying around that are broken or are not getting used you can melt them in an old pan or in the oven then cool and cut into square or just use a mini muffin pan (you will probably not want to use the muffin pan for muffins after that so use an old one or one from a thrift store. This would give you an idea of how your kids like non-traditional crayons before you invest. You can even make rainbow layer ones, let the wax completely cool before adding a new layer, or swirl styles.Â
Â
If you're going to invest in the stockmar crayons be sure to check out all the options first. We went with the 16 of each in a tin and 8 of each in the supplementary colors in tins. The tins are really nice but if they fall off the table they go everywhere and the sticks will break if stepped on. We still have them in the tins now but I'm working on a crayon roll for them. If you're looking at the tin of 8 there is the regular assortment and the waldorf assortment. The waldorf assortment has lighter colors but many are very similar. The regular have dark colors and, I think, black. Many of the colors in any of the sets are more natural and it's difficult to tell the difference between the dark colors without wrappers on the blocks and with the names in german on the sticks (but the kids are learning their colors in german!).
Â
We bought our first box on amazon because of the free shipping but they can be found for less else elsewhere. All our others after that first box are from a toy garden - check for coupons codes - but I've looked at waldorfsupplies.com as well. At ws.com they have discounts for large orders, they sell unboxed/untinned crayons for less if you're going to make a crayon roll to keep them in (they sell one but it's super pricy), and they sell individual colors if you want more than one of a few favorites.Â