Today we went to the Tate, to see if my mother's wheelchair could navigate Ai Weiwei's porcelain "sunflower seeds".
However, we discovered that visitors to Tate Modern have been banned from walking on the 100 million plus porcelain seeds.
The seeds were created by Chinese artist Ai Weiwei to fill the central London gallery's turbine hall.
When it opened on 11 October he urged guests to stomp on the seeds and roll in them.
But concern has now been raised over "dust" being created by people trudging through them, leaving art fans to look at the work from behind a barrier.
But I think that's not the real reason. Nope. It's not the dark spectre of health and safety looming. It's because people couldn't help stuffing their pockets full of free souvenirs, courtesy Ai Weiwei.
Even when it's cordoned off, some people still can't help themselves...