Here is a set of lists of all of the locations of all of the Red Capsules that you can find around Metroville in the Disney Infinity The Incredibles Play Set. They are laid out in the same order as you will find on the customisation screens so that you can more easily work out which ones you have missed (not exactly a recommended order for collection).
See also the page that lists all of the Green Capsules along with their locations and which Toy Box items they unlock.
On top of building on north side of street going through middle of Downtown, next to lift with buttons.
On scaffolding on small platform in water to the north of the city between the red buoys.
In the air next to road curving away from western bridge going north, in north part, jump from long orange pole on roof.
On side of tall building on north side of street going through middle of Downtown, use wall jump.
Next to multicoloured containers in the middle of the swinging crates at the start.
On small ledge on top of tall building directly south of the road that leads south from the short pier in the north.
On AC unit of side of building in north-east part of north town, one with pole you can knock over.
On top of building on north side of street going through middle of Downtown, second tallest, climb platforms to reach top.
In gap between buildings to the right of the curved green, smash down a billboard on top of building to reach it.
In air next to billboard you can knock over on tall building west of the fountain.
In air to the east of the fountain, knock over tall pole on top of building.
On set of three small platforms in front of billboard to the west of the fountain.
On small ledge on building with lifts along curved road in south-west part of northern town.
On wire between power poles at junction to the north of the curved green, on the left side.
(No, I can't tell the difference between half of them either)
Along curved ledge on building with billboard along curved road in south-west part of northern town.
On top of tall building directly south of the road that leads south from the short pier in the north.
On side of building on south side of street going through middle of Downtown, on the curve.
In the air along street going through middle of Downtown, knock over pole on roof to reach.
On small platforms in front of billboard along northern road going towards the long pier.