The ornamental design for a connector for educationalconstructionkits, as shown and described.
FIG. 1 is a front perspective view from above.
FIG. 2 is a rear perspective view from below.
FIG. 3 is a top plan view.
FIG. 4 is a bottom plan view.
FIG. 5 is a front view.
FIG. 6 is a rear view.
FIG. 7 is a left side view.
FIG. 8 is a right side view; and,
FIG. 9 is a section view (9-9 as indicated in FIG. 3).
FIG. 3 shows a dashed line indicating an axis labeled “9” for the section view of FIG. 9. The dashed line and labels indicating the axis form no part of the claimed design.