Below is a complete list for the locations of all minikits in Chapter 01: Struck Off the List.
Part A Minikits
Minikit #01: You should notice this frozen piece bobbing along the river at times. The ice must melted first before you can pick this minikit up. Do so with a character who can use lasers.
Minikit #02: Use Hawkeye's arrows to destroy a total of five red lights on the ground close to the Avengers Initiative Pad to get this collectible.
Minikit #03: Use Hawkeye to deal with the red handle on the boards so you gain access to the mine's entrance. Ultron should then move the black bricks so Scarlet Witch can pull the cart out.
Minikit #04: You need to knock down the tower that stands across from the laser gate. Do so by having Captain America and Thor use the Avengers Initiative Pad.
Minikit #05: In the room with fires, you'll find some bars blocking access to a control console. Destroy these bars and operate that panel on the other side for this piece.
Minikit #06: This one requires somebody with stealth or cloak ability, like Fury or Black Widow. Use that to safely slip past the cameras undetected and activate the switch off to the left side of the bunker. Switch to Scarlet Witch next and hypnotize the person inside.
Part B Minikits
Minikit #07: While destroying enemy planes with Iron Man, there is a missile tailing him that you can destroy for this minikit.
Minikit #08: Pick out someone who knows how to use a scanner and use on the wall off to the right of the mortar. This will reveal some poles for an athletic character to use.
Minikit #09: For this minikit, there is a crawl space or grates that Vision can pass through. Then trace the golden hydra on the wall at the other side. Build a SHIELD logo from the bricks. Fly and snag the collectible.
Minikit #10: From the 9th minikit, head right to find a toll booth and smash it, so you can build a ramp instead for Quicksilver to use and get this piece.