A toy building element and a method and a mold for producing such a toy building element for a toy building set

A toy building element comprising:

• a housing defining:
• two parallel surfaces connected by two sidewall flanges;
• a first channel extending between the two parallel surfaces, the first channel having a relatively wide cross-section proximate to the two sidewall flanges and narrowing progressively away from the two sidewall flanges, and
• a stiffening wall intersecting the first channel, dividing the first channel into a two separate parts, the stiffening wall positioned closer to one of the two parallel surfaces than it is to the other one of the two parallel surfaces.

A toy building element comprising:

• a housing defining:
• two parallel surfaces connected by two sidewall flanges;
• a first channel extending between the two parallel surfaces, the first channel having a relatively wide cross-section proximate to the two sidewall flanges and narrowing progressively away from the two sidewall flanges;
• a first tubular connector socket adjacent the first channel, the first tubular connector socket extending along a first tube axes between the two parallel surfaces;
• a second tubular connector socket disposed adjacent the first channel, on an opposite side of the first channel as the first tubular connector socket, the second tubular connector socket extending along a second tube axes between the two parallel surfaces;
• a second channel adjacent the second tubular connector socket, the second channel extending between the two parallel surfaces, the second channel having a relatively wide cross-section proximate to the two sidewall flanges and narrowing progressively away from the two sidewall flanges;
• a third tubular connector socket disposed adjacent the second channel, on an opposite side of the second channel as the second tubular connector socket, the third tubular connector socket extending along a third tube axes between the two parallel surfaces;
• and
• a plurality of stiffening walls intersecting each channel, dividing the respective channel into a two separate parts.