Dear Sir / Madam,
Is it possible that you give each painting an indication of how much a painting is worth. I try my children to learn something of art history. And when there is a price tag, they could be extra impressed. And hopefully they will remember the painting more.
Yigru Zeltil commented
But we already have that feature... On some paintings that reach price records at auctions we do note this: http://www.wikipaintings.org/en/jackson-pollock/number-5-1948-1 However, most artworks of the past centuries are in museums already. Price estimations would hardly be worth the effort.
and where you suppose we obtain this information? let's say, give us a price tag for Michelangelo's David)