Chris Winters rents bouncy castles and inflatable party games from his base in Rowley Regis.
But in March he was burgled causing his business to almost fold.
This CCTV footage shows items being stolen from Jumpin'Jacks Bouncy Castle Hire.
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They will be joined by Duke Dumont and Disciples at this year's festival in Staffordshire.
There is no evidence the Westminster attacker Khalid Masood was associated with so-called Islamic State or al Qaeda, the Met Police said.
A cloudier start, but turning dry, sunny and warm.