Recently, on one of my many cruises into JoAnn Fabrics, I came across these trays in the summer seasonal section. I loved these particular trays! They were unique because they were much longer than the common tray that I usually find. Plus, they have this interesting texture on them that is good enough to notice but not too much that it is distracting. I bought two--one for each of my kids. I loved the red one because right away my CVI light went off. I also liked the edging on these because they had some curve to them.
You can also get an idea of the length & width of them
(especially since they cover up most of my 3 1/2 year old son!)