Security cameras have captured robberies at two Adelaide toy stores where close to $30,000 worth of Lego was stolen, a little over three weeks from Christmas.

Thieves cleared out Laygo on South Road in St Marys in the early hours of yesterday morning, two days after Daw Park's Toys R Go was targeted.

Laygo store owner Steve Campbell said the bandits "emptied and destroyed his shelves".

Brazen thieves have been caught on CCTV breaking into two Adelaide toy stores and getting away with more than $30,000 in Lego products. (Supplied)

"They went straight to the alarm and smashed it like crazy," he said.

"Before they came in... There was Lego all over the floor that they tipped out and sets all over the floor and alarm smashed, boxes smashed, printer smashed."

The pair used a crow bar to smash their way into the business, before kicking down the door and making off with 100 sets of Lego, valued at around $10,000.

The robbers used a crow bar to smash their way into the Lay Go store in St Marys, before making off with 100 sets of Lego - valued at around $10,000. (Supplied)

The offenders are said to have 'emptied and destroyed' the stores shelves, in just one of two recent Lego robberies in the city. (Supplied)

Mr Campbell says he's "gutted" at the break-in, which comes a little over three weeks out from Christmas, but will keep his doors open.

"I'll open with empty shelves but we'll see how it goes. Nothing is going to spoil Christmas," he said.

Police allege the suspects loaded the Lego into a yellow Mazda van before leaving the scene.

Laygo owner Steve Campbell said he is devastated by the damage done in the robbery, but plans to still open his store for Christmas. (9NEWS)

The brazen robbery also comes after a vintage and collectables toy shop was broken into on Goodwood Road at Daw Park on Sunday evening.

Sixty-nine of the store's most expensive and rare Lego sets were stolen in the break-in.

Toys R Go owner Greg Horner says he's lost more than $16,000 worth of "irreplaceable" stock.

Mr Campbell also said he found Lego products had been tipped out of their boxes onto the store floor in the break-in. (9NEWS)

"They've stolen lay-buys that parents have come in and put on lay-buys for their families, and the nature of the stock that we sell is really difficult to get a hold of," he said.