Below is a complete list for the locations of all minikits in Chapter 09: Ready A.I.M. Fire.
Part A MInikits
Minikit #01: Search the west side of the balcony for a glass object for Hawkeye to smash, and then have him pull the red handle to claim this piece.
Minikit #02: Head for the opposite side of the same balcony and destroy the propane tank below the grill.
Minikit #03: You need to destroy a total of three monitors in the area to get this collectible. The first one is just above the fireplace; another is beyond a wall of flames; and the last one is on the wall across from where the fireplace is.
Part B Minikits
Minikit #04: There's a box nest to the transformer that you can destroy. Do so and build an electric panel for Thor to power up using his lightning powers.
Minikit #05: You'll find this piece behind a fence just to the right of the blue door that housed the second transformer.
Minikit #06: Search the main road for a black box that Ultron can destroy. Construct a speed boost ramp from the bricks and have a fast character (like Quicksilver) use it.
Minikit #07: There's a van with green handles near where you met Ellen Brandt. Move this with brawny character (like Hulk) then have Vision go through the vent. Grab this collectible at the shop the vent was attached to.
Part C Minikits
Minikit #08: Just past the big blue containers to the right is a cage with a gold door you can cut through with lasers. Go in then fly up to get this collectible.
Minikit #09: At the cage where you found the 8th minikit, is a glass for Hawkeye to break. Construct a red handle from the bricks that you get and use it pull open the blue storage container nearby.
Minikit #10: Search the area for a golden barrel and break through the cracks to get this collectible inside.