In the Museum of Modern Art is an acorn. Not an Andy Warhol replica of an acorn or a made in Japan plastic toy acorn. It is a natural ordinary acorn; the type that grows on oak trees but there are no oak trees in this Museum of Modern Art. Some person who may, or may not, be an artist has gathered this acorn brought it here and exhibited it in a glass case. A neatly written card beneath the plinth carries the information ‘Acorn. By J W R Eaglestrophe et al. London and elsewhere. Various dates up to last Thursday.’ Summer visitors will only see the acorn smile and mutter yes, but is it art? In time, who knows, it could become valuable; the world’s first £10,000 acorn. The Museum of Modern Art has other treasures too some of which pass unnoticed like the ever-growing heap of Coca-Cola cans lying in the trash bin.