Police have said the motive for the attack is not yet clear.
It is the biggest of the high street retailer’s 365 stores across Europe and the US.
A man accused of being involved in the Birmingham pub bombings has vehemently denied his involvement in the 1974 atrocity.
The jury concluded all the victims were unlawfully killed.
West Midlands Police confirmed a 35-year-old man had been taken into custody.
The child is believed to be with James Dempsey, West Midlands Police said.
Safwaan Mansur and Hanzalah Patel tried to evade surveillance during failed attempts to cross into Syria
The latest attack is not believed to be linked to windows smashed in five other buildings.
Five mosques in Birmingham had windows smashed with sledgehammers overnight, in what appears to be a coordinated string of attacks.
Some objected to Parkfield Community School’s lessons, which they claimed gave ‘too much emphasis’ to LGBT issues.