To find all the puzzle pieces in the 6-2 Prehistoric Path stage of Donkey Kong Country Returns, follow these detailed steps:

### Puzzle Piece 1
1. **Avoid the Blast Barrel**: Do not get in the Blast Barrel. Instead, drop to the ground and run all the way to the right to find the entrance to a bonus area.
2. **Collect the Puzzle Piece**: Once you’ve collected the Puzzle Piece, roll jump to the Blast Barrel to continue your journey.

### K
1. **Jump Gaps**: Catch the K as you jump the gaps in the track.

### O
1. **Take the Lower Track**: Take the lower track to nab the O.

### Puzzle Piece 2
1. **Jump Over Spikes**: Instead of ducking under the spikes, jump into the opening on the side.

### N
1. **Bounce High**: Bounce high off the Tiki Buzz to reach the N.

### Puzzle Piece 3
1. **Bounce Off Tiki**: Bounce off the Tiki to take the upper track and jump at the end to nab the Puzzle piece.

### G
1. **Jump Early or Roll Off**: Jump early or simply roll off the track onto the G.

### Puzzle Piece 4
1. **Short Hop**: Nab it by making a short hop while jumping the gaps in the eggshell.

### Puzzle Piece 5
1. **Ground Pound Cactus**: Ground pound the cactus by the Slot Machine Barrel.

By following these steps, you will have collected all the puzzle pieces in the 6-2 Prehistoric Path stage of Donkey Kong Country Returns.