Tickets to the four sold-out Wiggles concerts have started to appear on resale websites, Trade Me and Facebook - with up to a $200 mark-up.
Tickets originally sold for $37 are being listed for about $230 each and outraged parents are blaming scalpers with automatic programmes for buying up the tickets.
"I was on the website and had a friend doing the same and we missed out on all four shows," one mum said.
"Now they are on Trade Me, Ticketmaster Resale, and Facebook for more than $200."
On Ticketmaster Resale, a block of 10 tickets is available for $2300.