Simplify the following text for a Grade 7 native English-speaking person.
Original: Knut became the center of a mass media phenomenon dubbed `` Knutmania '' that spanned the globe and spawned toys , media specials , DVDs , and books .
Simplified: Knut became very popular and the center of mass media attention called `` Knutmania '' . Many toys , DVDs , and books were made about him .