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Plus-Plus 600 pc Open Play Mix Basic 03310, box with pieces and sample builds
Plus-Plus 600 pc Open Play Mix Basic 03310, box
Plus-Plus 600 pc Open Play Mix Basic 03310, hot air balloon build
Plus-Plus 600 pc Open Play Mix Basic 03310

Images: Plus-Plus

Researched

Plus-Plus 600 pc Open Play Mix Basic 03310

A cube box of 600 Plus-Plus pieces in 10 classic colors, with an idea guide to start from.

$39.99 at Plus-Plus · Price checked Nov 12

See it at Plus-Plus

Prices at other stores may differ · Links go to the retailer

Our verdict

The 600 pc Open Play Mix Basic is a box of 600 Plus-Plus pieces in 10 colors: red, orange, yellow, green, blue, purple, white, brown, grey and black. Every piece is the same shape, about 0.75 x 0.5 inches. It comes in a reusable cube box, listed at 4.3 inches a side, with an idea guide. Plus-Plus suggests it for ages 5 and up and lists it at $39.99.

We could not read owner reviews on the Plus-Plus page, so this review rests on the maker's listing. This is an open-ended mix, not a kit with one model to finish. The idea guide gives starting points, and Plus-Plus points to app instructions for the Basic mix. The maker says the pieces are made in Denmark from polyethylene that is free of BPA and phthalates.

It suits kids who like to invent their own flat mosaics and 3D figures, and families adding pieces to a set they already own. Skip it if your child wants step-by-step builds and baseplates, which the Learn to Build sets include, or if small pieces are a problem at home.

Key details

  • Ages 5+
  • 600 pieces
  • Building sets
  • Plus-Plus
  • Available

More info

  • Item number: 03310
  • Product line: Open Play
  • Pieces: 600
  • Colors: 10
  • Also includes: Reusable box, idea guide
  • Piece size: 0.75 x 0.5 in (20 x 12 mm)
  • Package size: 4.3 x 4.3 x 4.3 in
  • Suggested age: 5+ (maker)
  • List price: $39.99
  • Warning text on maker page: Not listed
Best for and who should skip it

Best for

  • Kids 5 and up who build from their own ideas
  • Adding 600 pieces to an existing Plus-Plus collection
  • Trips, since the cube box closes and is 4.3 inches a side

Skip it if

  • Your child wants step-by-step models to follow
  • You want baseplates; none are listed in this box
  • Younger siblings still put small things in their mouths
What we like and what to keep in mind

What we like

  • 600 pieces in 10 classic colors
  • Reusable box that the maker calls travel-friendly
  • One shape that builds flat pictures and 3D models

Keep in mind

  • The maker's page shows no warning text; check the box
  • No baseplates are listed in the box
  • Pieces are small: about 0.75 x 0.5 inches each
How we reviewed it

Researched, not hands-on tested. This review is based on the sources listed below. We have not tested this product ourselves. Check the current product listing and packaging before buying.

Based on the maker's specifications and public owner reviews, checked Nov 12, 2026.

Plus-Plus 600 pc Open Play Mix Basic 03310, box with pieces and sample builds

Plus-Plus 600 pc Open Play Mix Basic 03310

Researched · Ages 5+

$39.99

Links go to the retailer

See it at Plus-Plus

Plus-Plus 600 pc Open Play Mix Basic 03310

$39.99 · Links go to the retailer

Check price

Sources.

What we read for this review, and when we last checked it.

  1. 01 Plus-Plus. 600 pc Open Play Mix - Basic plusplususa.com · Checked Nov 12, 2026
  2. 02 Plus-Plus. Learn To Build - All Sets plusplususa.com · Checked Nov 12, 2026