The wood letter block and tray are made of natural wood which non-toxic and safe for kids.The large, colorful print are wonderful colorful printed pattern with rounded corners and no sharp-edges, smooth and burr-free. Montessori educational toy helps toddlers develop strategic thinking in the brain, greatly develop memory skills. Toddler learning cards with color companied by lovely illustrations more likely to attract children attention, spelling letter game keep your kids off of screens for long period.