The Playground Cache

This is a multi of approximately 2 km through Noordwijk-Binnen.
It's a fun cache with kids, because with each coordinate you will get to a playground!
You can park your car in the street at coordinate: 

Parking: N52° 14.260 E004° 27.141 

Start the cache at the playground on the first coordinate:

Go to WP1: N52° 14.267 E004° 27.144

The number of wooden boards from the bench = A 
The number of playing items that are tightened to the ground - 1 = B

Go to WP2: N52° 14.2A3 E004° 27.0B2
 
Add up the digits of the house number of the house closest to the playground = C
The number of poles made of stone + 2 = D

Go to WP3: N52° 14.2C8 E004° 26.7D7
 
The number of "Frogs"- 4 = E
The number of swings in the playground = F 

Go to WP4: N52° 14.1E3 E004° 26.8F0
The number of tools on the board - 2 = G
First number on the electricity house - 1 = H
 

Go to WP5: N52° 14.1G9 E004° 27.1H4
 
The shape of the playground = I
There are 2 similar street signs. The number below the left board = J

Calculate the final coordinates with your answers: 

FINISH: N52°14.GJA E004°27.FID
 
The cache is accessible from the sidewalk. Do not go in the park!
Please cover the cache again. Because bushes are pruned, the cache is very striking.
Walk back again the same way you came! There is no other way out.

Hint:
Actually, everything is very easy to find.