You can activate the following Tools in the Building Entrance window. Select them in the Booster column on the right.
- Bombs: adds 2 Bombs at the start of the level,
- Color Blast: adds a Color Blast at the start of the level,
- Line Crusher: adds 2 Line Crushers at the start of the level.
Activate the Tools you want at the start of a level in a Building to add them to the level.
To learn more, see the article 'What special Tile combinations can I make?'