For those of you who have kids: these are two books I've found at the library, I'd like to buy them later.
Museum 123 / by the Metropolitan Museum of Art
ISBN 0-316-16044-X
The quantities and numerals are taught by showing the fragments of van Gogh's paintings, Medieval manusсriрts and Coptic textiles with "one unicorn", "two onions", "four fishes". Exciting!
Pish, Posh, said Hieronimus Bosch by Nancy Willard
ISBN 0-15-262210-1
About a housekeeper who used to comb, feed and walk all the weird creatures Hieronimus Bosch painted (sure, they all lived in his household).
Sometimes I feel like I was that lady...