THIS ALPHABET NESTING AND STACKING BLOCKS PURCHASE HAS BEEN ONE OF MY BEST CHOICES SO FAR...FOR HIS PRESENT AGE..ALMOST TWO.......HE ENJOYS BUILDING WITH THEM, KNOCKING THEM OVER, EXAMINING THEM AND OF COURSE NESTING THEM...IN AND OUT...DUMPING THEM ON THE FLOOR, PUTTING THEM BACK TOGETHER AGAIN.....AND BY OSMOSIS IS LEARNING HIS COLORS, NUMBERS AND LETTERS....SIZES LARGE AND SMALL....WHAT FITS AND WHAT DOESN'T....IN AND OUT...ETC. ETC......QUIET PLAY, EXCITED PLAY, LEARNING PLAY AND JUST SIMPLY FUN PLAY ...I HIGHLY SUGGEST ADDING THIS PARTICULAR ALPHABET NESTING AND STACKING BLOCKS SET FOR ALL LITTLE ONES, TODDLERS AND OLDER....WE ADULTS ALSO ENJOY WATCHING HIM PLAY AND HELPING HIM BUILD WITH THEM....SO, THIS IS REALLY A VERY SPECIAL SET OF MULTI PURPOSE BLOCKS MUCH DIFFERENT FROM HIS COLORLESS WOODEN BUILDING BLOCKS AND SOFT MATERIAL BLOCKS....THANK YOU , MELISSA AND DOUG.....THE CARDBOARD MATERIAL IS OF A VERY STRONG QUALITY AND IS ABLE TO TAKE A GREAT DEAL OF PLAYTIME.

Very cute blocks, but I don't think cardboard blocks should be targeted for 2-4 year olds. At that age, everything is a chew toy. I would like this product way more if it was plastic.