Are you bored of this bridge yet??

Absolutely no brain power or energy today. Just got back from A&E after taking no.1 for suspected broken arm. All fine, he's home asleep now, but all shattered. This was the bridge outside nursery, taken before I picked him up this afternoon. Probably around the time he was falling :-(

PS Does anyone know what the white discs are in the wall? I've been pondering this for months now....