Mega Brands America has recalled about 2.4 million Magtastik and Magnetix Jr. toys, as well as MagnaMan figures.

More: Other Recalls, Safety Info

The U.S. Consumer Product Safety Commission said that magnets in the small flexible parts of the animals, vehicles and building sets can detach.

Magnets found by young children can be swallowed or inhaled. If more than one magnet is swallowed, the magnets can attract each other and cause intestinal perforations or blockages, which can be fatal.

The problem has led to many other recalls from this and other brands in the last several months.

The CPSC said it received 19 reports of magnets coming loose from building toys, including one report of a 3-year-old boy receiving medical treatment to remove a magnet from his nasal cavity and one report of an 18-month-old boy with a magnet in his mouth, which was not swallowed.

The figures were responsible for another 25 reports of problems.

This recall of building toys includes several products:

Magtastik Starter Set, Model No. 427

40 Piece Tub, Model No. 468

Magtastik Deluxe Set, Model No. 428

Deluxe New Starter Set, Model No. 467

Primary, Model No. 429

Wonder Coaster, Model No. 465

Primary Starter, Model No. 431

Starter Set New Parts, Model No. 496

Car, Model No. 434

Helicopter, Model No. 435

Wonder Coaster, Model No. 465

Fun Pack, Model No. 448

Jumbo 24 Piece Bag, Model No. 456

Round Bag, Model No. 461

12 Piece Mag Bag, Model No. 462

Target Bucket, Model No. 466

Magnimals - Dog, Model No. 425

Magnimals - Monkey, Model No. 424

Magnimals - Dinosaur, Model No. 426

Magnimals Assortment, Model No. 423

Mag Mobile Assortment, Model No. 433

Magnimals Pet Set, Model No. 436

Magnimals Bonus Pack, Model No. 446

Easter Pack, Model No. 469

Alien, green, Model No. 28170

Robot assortment, Model No. 28198

Robotor Red, Model No. 28171

Vac Metal, Model No. 28327

Flame, orange, Model No. 28172

Gigantor, blue, Model No. 28173

Toyoto the Samurai, purple, Model No. 28164

Sir Lancelot the Knight Gray, Model No. 28165

Vac Metal Assortment, Model No. 28327

Eric the Viking Blue, Model No. 28166

Assortment, Model No. 28254 or 28199

Brutus the Gladiator, yellow, Model No. 28167

4-Pack, Model No. 28175

3-Pack, Model No. 28393

2-Pack,, Model No. 28392

They were sold at Wal-Mart, Target, Toys R Us, K-Mart and other toy stores nationwide from January 2005 through December 2007 for between $10 and $40.

Mega Brands said consumers should stop using the toys and return them for a free replacement. For more information, call 800-779-7122 between 8 a.m. and 6 p.m. ET Monday through Friday or visit MegaBrands.com.