Best Lincolnshire barn doors to throw flaming axes at?

[DanseAvecLesLoups]

Trying to fine tune summer holiday activities for the kids.

Any advice?

Lincolnshire is huge! Can you be more specific and how old are your kids?

I know this is a parody... but can recommend a great activity centre for kids very near to Lincolnshire (its just over the border into Nottinghamshire)

5 and 7. They are happy throwing junior tomahawks and I think they are ready for an activity holiday where they step up to using 10" Viking flaming battle axes. Just having trouble finding the correct barn door to accommodate throwing from 20ft away. Anywhere close to Boston would be great.

I genuinely cant work out if you are being serious or not!

Are barn doors not made of wood and hence rather flammable?